The chief component of the middle lamella in plant cells is :

Options

A. calcium
B. iron
C. magnesium
D. potassium

Explanation

To answer the question about the chief component of the middle lamella in plant cells, let's break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Middle Lamella**:
- The middle lamella is a layer that exists between the cell walls of adjacent plant cells. It acts as a cementing layer that holds the cells together.

2. **Composition of Middle Lamella**:
- The middle lamella is primarily composed of pectin, which is a polysaccharide that provides structural support and stability to the plant cells.

3. **Key Components**:
- While pectin is the main component, the middle lamella also contains other substances. The most significant of these is calcium, which is present in the form of calcium pectate.

4. **Calcium Pectate**:
- Calcium pectate is a compound formed when calcium ions bind with pectin. This compound plays a crucial role in the stability and integrity of the middle lamella.

5. **Conclusion**:
- Therefore, the chief component of the middle lamella in plant cells is calcium, specifically in the form of calcium pectate.

### Final Answer:
The chief component of the middle lamella in plant cells is **calcium**.

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